Question

I ....... that sweatshirt for 10 years.​

Answer 1

Explanation:

I had kept that sweatshirt for 10 years

Answer 2

Answer:

Have been wearing.

Explanation:

I have been wearing that sweatshirt for 10 years.

NOTE:-

In the above sentence the word "for" is the indicator of Present Perfect Continuous Tense. If there is no indicator for past time, we should prefer present tense over past tense.